bu-bu-bu-but I thought vegan food was all natural and full of unicorns and shiat? You mean to tell me it's just as filled with shiat as the food they volunteer to constantly tell us is chemically treated unhealthy shiat?

Actually, you got it right subby. Most people don't know that taint is not recognized by the UDSA as meat, so some companies use taint to flavor-up their veggie burgers. It can add a hint of earthy tang, as well as giving the burger a more natural brown color.